DL-Methionine Manufacturer
Melting Point and Thermal Stability of DL-Methionine
Melting characteristics: DL-methionine has aclear and fixed melting pointof281–283 °C(decomposition). During heating, the crystals melt into a transparent liquid, and then decompose with the release of a small amount of methyl mercaptan (CH3SH) gas (with a characteristic pungent odor) when the temperature exceeds the melting point. It is worth noting that the melting point of DL-methionine is higher than that of L-methionine (280 °C) and D-methionine (279 °C), which is due to the denser crystal lattice formed by the racemic mixture of two enantiomers, resulting in stronger intermolecular forces.
Thermal stability: DL-methionine has good thermal stability at temperatures below 100 °C. It will not decompose when heated at 80 °C for a short time (e.g., during drying), which meets the requirements of industrial processing such as granulation and tableting. However, prolonged heating above 200 °C will cause the cleavage of the C-S bond in the side chain, producing volatile sulfur-containing compounds and reducing the purity of the product.
Storage stability: DL-methionine should be stored in a sealed, cool, and dry warehouse. It is stable when isolated from moisture and high temperature, with a shelf life of more than 2 years. However, it will undergo slow oxidation when exposed to humid air and oxygen for a long time, with the sulfur atom in the side chain being oxidized to a sulfoxide group, forming DL-methionine sulfoxide, which reduces its biological activity.
Other supplier products
|
|
L-proline Bulk supply |
The physiological functions and applications of L-proline1. Functions within living organismsCollagen synthesis: As the main component of collagen ... |
|
|
L-Lysine monohydrochloride Partners, long-termCooperation |
The most prominent performance advantage ofL-Lysine monohydrochloride is its optimized physical and chemical properties that eliminate the critical... |
|
|
DL-Alanine 302-72-7 |
DL-Alanine’s uses span multiple fields, leveraging its amino acid properties and cost-effectiveness (it is often cheaper to produce than pure... |
|
|
L-Methionine powder Manufacturer |
L-Methionine accelerates tissue repair by: Promoting the synthesis of collagen and elastin, which form the structural framework of healing tissues ... |
|
|
L-Cysteine hydrochloride monohydrate 7048-04-6 |
L-Cysteine hydrochloride monohydrate is a chemically modified form of the amino acid L-cysteine, widely used in various industries for its unique p... |
All supplier products
Same products
